Doubly terminated amethystine quartz crystal

A doubly terminated crystal, or double-terminated crystal, is a crystal with natural facets on both ends.[1]

References

  1. ↑ Shipley, Robert M. (2011). "termination". Dictionary of Gems and Gemology. Read Books. p. 99. ISBN 978-1-4465-4701-4 – via Google Books.


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